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Annotate the last y ion if the peptide has an n-terminal label #2

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vagisha opened this issue May 9, 2015 · 0 comments

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vagisha commented May 9, 2015

Example spectrum in PeptideAtlas:
https://db.systemsbiology.net/dev2/sbeams/cgi/PeptideAtlas/ShowObservedSpectrum?atlas_build_id=442&spectrum_identification_id=1716849097&peptide=n[145]MTQSPSSLSASVGDR&assumed_charge=2

From Eric's email:

Another remarkable thing is that with nearly all of these iTRAQ/TMT spectra, you see the very last y ion! i.e. without the label:
1522.7034 22.0 y15/-8.7
But Lorikeet stops at y14.
A fun added feature would be: IF the peptide has an n-terminal label (n[145],n[230], etc.) then DO annotate the last y ion (y15 in this example), otherwise do not (but it won’t be there)

vagisha added enhancement and removed enhancement labels

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